Howto:Add shared models manually: Difference between revisions

A really useful resource at this stage is [http://www.terraserver.com TerraServer].  Enter a street name, city, and state. Then you can choose from several types of public-domain aerial photography from the US Geological Survey. When you get a good photo of your feature, click on the Info link. Your image will be broken into tiles with latitude and longitude of the edges of the tiles. This is good way to get close to the position you want. Google Earth is also a good way to obtain position information, and there are other websites that will provide it also, or you can get it from a GPS.

Then, you need to place the object precisely. An easy way do this is with the [[UFO]] "airplane". In addition to making it easy to move around (or not), it allows you to place objects and see what they look like there.  It calculates the positioning details for you and writes them out in the correct format.  See [[Howto: Place 3D objects with the UFO]].  Here, though, we'll continue by describing a manual way to do it, for people who may need or want to know the inside details.   

Start FG and fly to the location where you want to place the object. Open up the property browser in FG (File->Browse Internal Properties), and the <tt>/position</tt> key.  Write down the values for <tt>latitude-deg</tt>, <tt>longitude-deg</tt>, and <tt>ground-elev-m</tt>. If you want to place the object above ground level, then add the appropriate number of meters.  Then, go to the <tt>/environment</tt> key and write down the tile number (current-tile-id).